Hello Forrest. The K2/100 to the ALS-600 is a great combination. I ran the ALS-600 with K2/100 for quite a while and then gave up the ALS-600 to my brother who had been eyeballing it from the time I got it! It does a great job for him as well.
I don't have an answer for you re: ALC from the ALS-600 to the K2. I don't know an acceptable way to put "external" ALC into the K2 - so I'm no help in that area. I always just ran mine by either cranking down the power control on the K2 or leaving it up and running commensurately higher power out of the ALS-600. I might say that the ALS-600 performed very well (ran cool and didn't "fault") with the higher drive. However, there is one thing that you might want to look into depending on the reason you want to limit the drive to 40 watts. If your interest in limiting the drive is because you want to use - or are already using digital modes with the combination, then what follows will not be of interest. But, if your interest in only using 40 watts of drive is related to only having a limited amount of output from the ALS-600 - AND - you think that you won't want to exceed that output any time soon, you could continue to leave the K2 power control "up" and reduce the output from the ALS-600 by using a larger "swamping" resistor in the ALS-600. Apparently Ameritron has changed the "default" value of the "swamping" resistor used in the ALS-600 over the years (compare early part lists with later part lists) - perhaps to compensate for the gain of individual units or other circuit changes. I believe the values have been 100, 45, 35 and 25 ohms - or at least values in those ranges. The resistor is a high wattage non-inductive type that mounts in a couple of large "fuse clips" and is located on top of the amplifier board - easily accessible with the top of the RF unit removed. Ameritron sells the resistors (as I recall) for about $25 plus shipping and a call to their factory number will put you in touch with someone (probably "Willie") who can advise you. I know all this because mine had the 45 ohm resistor in it and it was attenuating the drive too much (evidenced by lower than expected output from the ALS-600). I replaced it with the 35 ohm resistor which resulted in much better output. There is no reason you couldn't go to a higher value to limit the output if that met your needs. Usual disclaimers, YMMV, etc, etc. 73 es gud dx --don n4hh K2/100 #2028, KAT100, KX1 #243, etc, etc! ----- Original Message ----- From: "Forrest Myers" <[EMAIL PROTECTED]> Subject: [Elecraft] K2/100 into an Ameritron ALS-600 amp. <snip> >The K2 does not have an external connection for ALC . . . >I don't want to put over about 40 watts into the external . . . > Does anyone have any ideas on how to hook an external ALC control to the > K2/100? > Any ideas? > > 73, > Forrest Myers > AG4ND --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.728 / Virus Database: 483 - Release Date: 7/27/04 _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
